Because a tweet that was meant as a joke by KLM Royal Dutch Airlines instead angered disappointed Mexican soccer fans.

Minutes after the Netherlands' historic 2-1 World Cup victory over Mexico on Sunday, KLM tweeted on its official Twitter account a photo of an airport departure sign under the heading ‘‘Adios Amigos!’’

The post immediately went viral. After it was retweeted 8,500 times -- and drew angry reaction from some (uh, overly sensitive?) Mexican celebrities, such as actor Gael Garcia Bernal, who vowed never to patronize the airlines again -- KLM deleted the tweet.

‘‘It was meant to be a joke,’’ KLM spokeswoman Lisette Ebeling Koning told The Associated Press. She said the airline didn't intend to offend Mexicans. ‘‘But there was too much negative reaction.’’

Meanwhile, AeroMexico tweeted its support for the vanquished soccer team under an arrival sign: ‘‘Thank you for this great championship," the airline said. ‘‘You've made us proud and we’re waiting for you at home.’’